What is the unstable idle speed of Qichen d60?

Unstable idle speed may be that the exhaust gas of air or gasoline vapor in the intake system enters the intake pipe, which will cause the mixer to be too rich and too thin, which will make the engine burn abnormally, the throttle valve and the intake port accumulate too much pollution, and the intake air at idle speed is not allowed.

Causes of fuel system:

1, injector failure. If the injector leaks oil or is blocked, it can't inject oil according to the instruction of ECU, which will cause the mixture to be too rich or too thin, make individual cylinders work badly, and lead to unstable engine idle speed.

2. Fuel pressure failure. If the oil pressure is too low, the fuel sprayed by the injector is in poor atomization state or sprayed fuel layer, and only oil droplets are sprayed in serious cases; Oil pressure is too high, the actual injection. The amount increases and the mixture is too thick.

3. The fuel injection quantity is inaccurate. The fault of each sensor or line causes the control unit to send out wrong instructions, which makes the fuel injection amount incorrect, and the mixture is too rich or too thin, which is the indirect reason for the unstable idle speed.

It could also be an ignition system. First of all, the failure of the ignition module will cause the spark to be too weak or unable to ignite. For this kind of measurement, we can only say that the stimulus voltage model is invisible in the voltage, but the ignition trigger signal can be measured. The ignition coil and the ignition module may be caused by insufficient ignition signal from the computer, or the power supply circuit of the ignition module, etc. In actual maintenance, this happens from time to time.